1 files changed, 47 insertions, 0 deletions
diff --git a/pd/doc/6.externs/obj4.c b/pd/doc/6.externs/obj4.c
new file mode 100644
index 00000000..3da2a84a
--- /dev/null
+++ b/pd/doc/6.externs/obj4.c
@@ -0,0 +1,47 @@
+/* code for the "obj4" pd class.  This adds a creation argument, of
+type "float".  */
+
+#include "m_pd.h"
+ 
+typedef struct obj4
+{
+  t_object x_ob;
+  t_outlet *x_outlet;
+  float x_value;
+} t_obj4;
+
+void obj4_float(t_obj4 *x, t_floatarg f)
+{
+    outlet_float(x->x_outlet, x->x_value + f);
+}
+
+void obj4_ft1(t_obj4 *x, t_floatarg g)
+{
+    x->x_value = g;
+}
+
+t_class *obj4_class;
+
+    /* as requested by the new invocation of "class_new" below, the new
+    routine will be called with a "float" argument. */
+void *obj4_new(t_floatarg f)
+{
+    t_obj4 *x = (t_obj4 *)pd_new(obj4_class);
+    inlet_new(&x->x_ob, &x->x_ob.ob_pd, gensym("float"), gensym("ft1"));
+    x->x_outlet = outlet_new(&x->x_ob, gensym("float"));
+    	/* just stick the argument in the object structure for later. */
+    x->x_value = f;
+    return (void *)x;
+}
+
+void obj4_setup(void)
+{
+    	/* here we add "A_DEFFLOAT" to the (zero-terminated) list of arg
+	types we declare for a new object.  The value will be filled
+	in as 0 if not given in the object box.  */
+    obj4_class = class_new(gensym("obj4"), (t_newmethod)obj4_new,
+    	0, sizeof(t_obj4), 0, A_DEFFLOAT, 0);
+    class_addmethod(obj4_class, (t_method)obj4_ft1, gensym("ft1"), A_FLOAT, 0);
+    class_addfloat(obj4_class, obj4_float);
+}
+